Kev Ua thiab Cia ntawm PH Meter Standard Buffer Solution
1. Cov khoom siv pH yuav tsum muab cia rau hauv qhov chaw qhuav. Piv txwv li, cov khoom sib xyaw phosphate pH tus qauv yuav deliquesce thaum huab cua av noo siab. Thaum deliquescence tshwm sim, tus qauv pH tsis tuaj yeem siv.
2. Secondary distilled dej los yog deionized dej yuav tsum tau siv los npaj pH txheem tov. Yog tias nws siv rau 0.1 qib pH meter ntsuas, cov dej distilled zoo tib yam siv tau.
⒊ Cov txheej txheem pH npaj yuav tsum tau diluted nrog lub khob me me kom txo cov pH txheej txheem kev daws teeb meem rau ntawm phab ntsa beaker. Ntxiv nrog rau kev tshem tawm cov hnab yas lossis lwm lub thawv uas khaws cov khoom pH txheem, lawv yuav tsum tau muab yaug nrog dej distilled ob peb zaug, thiab tom qab ntawd muab nchuav rau hauv cov txheej txheem pH npaj los xyuas kom meej tias cov txheej txheem pH npaj tau raug.
4. Cov txheej txheem kev daws teeb meem feem ntau tuaj yeem khaws cia rau 2-3 hli. Yog tias pom muaj turbidity, pwm lossis nag lossis daus, nws yuav siv tsis tau ntxiv lawm.
5. Alkaline txheem tov yuav tsum tau muab kaw thiab khaws cia rau hauv lub raj mis polyethylene. Tiv thaiv cov pa roj carbon dioxide los ntawm kev tsim cov pa roj carbonic acid tom qab nkag mus rau cov txheej txheem kev daws teeb meem thiab txo nws cov nqi pH.
